2points
what is the frequency of an electromagnetic wave with energy of 5.0 x 10-20
j?
o
a. 7.55 x 1013 hz
b. 5.22 x 105 hz
c. 3.98 x 10-6 hz
d. 1.67 * 10-28 hz
o
o
submit

V = 7.55 x 10∧13 Hz (A)

Explanation:

E= hv

E is energy

h is constant (6.626 x 10∧-34)

v= frequency

V = E/h

V = (5 x 10 ∧ -20) / ( 6. 626 x 10∧-34) = (5/6.626 ) x 10∧ -20-(-34)

V = 0.75460307878 X 10∧-20+34 = 0.75460307878 x 10∧14

V = 7.55 x 10∧13 Hz (A)

The frequency is 7.55 *10^13 Hz (option A)

Explanation:

Step 1: Data given

Energy = 5.0 * 10^-20 J

Planck's constant = 6.626 * 10^-34 J*s

Step 2: Calculate the frequency

E  = h *f

⇒ Energy =  5.0 * 10^-20 J

⇒ h = Planck's constant = 6.626 * 10^-34 J*s

⇒ f = The frequency (in Hz) = TO BE DETERMINED

f = E/h

f= 5.0 * 10^-20 J / 6.626 * 10^-34 J*s

f = 7.55 *10^13 Hz

The frequency is 7.55 *10^13 Hz (option A)

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

since electrons are negative the answer is neagtaive